Romero has been United’s goalkeeper so far this season due to De Gea’s situation at the club.
But Romero is keen for De Gea to stay even though it may jeopardise his own position at Old Trafford.
“The truth is that I have no idea (if he will leave), but for me I hope that De Gea stays here because he’s a good team-mate who always works hard and that is best for the group,” said Romero.
“It is a difficult situation for him but when one is a great professional like he is and when one has a good head like his you keep training to get better day by day because you never know, he could play this weekend.
“He is a great team-mate, a great professional, a great person. It happened to me last year in Sampdoria. I was not playing but I was working as if I was going to play.”
Romero joined United on a free transfer just four days before the end of their pre-season tour.